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An enzyme-catalyzed reaction was carried out in a 0.2M "Tris" buffer, pH 7.8. As a result of the reaction, 0.03 mole/liter of H+ was produced. (pKa of Tris =8.1) (a) What was the ratio of Tris+ (conjugate acid) / Triso (Conjugate base) at the start of the reaction? (b) What are the concentration of Tris+ and Triso at the start of the reaction? (c) Show the reaction by which the buffer maintained a near constant pH. (d) What were the concentration of Tris+ and Triso at the end of the reaction? (e) What was the pH at the end of the reaction? (f) What would the final pH be if no buffer were present?
if a sample of gas is at 2 atm and is at 15 degrees celsius, what would be the new pressure in the gas if the gas is heated to 100 degrees celcius?
The pKa of benzoic acid is 4.2, whereas that of carbonic acid, H2CO3, is 6.4. On the basis of this information, would aqueous sodium bicarbonate be sufficiently basic to deprotonate benzoic acid? Explain your reasoning.
What is the pH of the solution which results from mixing 25 mL of 0.30 M HF(aq) and 25 mL of 0.30 M NaOH(aq) at 25 ºC? (Ka of HF = .00072)
Consider the reaction Cu2S + O2 → 2Cu + SO2. If 55.0 grams of Cu2S is heated in excess O2, what is the mass of Cu that can be produced?
methylamine (CH3NH2 Kb=3.6x10^-4) with 25.0 mL of 0.10 M benzoic acid (C6H5COOH Ka=6.3x10^-5), will the resulting solution be acidic, basic or neutral?
Which of the following is a use for nuclear energy?
If the titrant has a molarity of 0.2750 M and there are 45.00 mL of analyte present, what is the molarity of the analyte?
what is a general formula that can be used to determine the max capacity for the following- a shell
How many milliliters of 0.200 M NaOH will be required to titrate 14.5 mL of 0.479 M H2SO4?
A mixture of Na_2CO_3 and NaHCO_3 has a mass of 81.5 . It is dissolved in 1.00 of water and the pH is found to be 9.92. Find the mass of NaHCO_3 in the mixture?
Suppose the pH of the water is 3.88 and that the concentration of iron(II) in the water is 2.30x 10-5 M, what is the potential of the corrosion reaction under the above conditions at 298 K?
Determine the molar mass of chloroform gas if a sample weighing .389 grams is collected in a flask with a volume of 102cm cubed at 97 degrees Celsius. The pressure of the chloroform is 728 mmHg.
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